Illuminated display sign



FIG. 1 is a perspective view of an embodiment of the illuminated display sign of my design with the broken line showing for illustrative purposes only and forming no part of the claimed design;

FIG. 2 is a front elevation of the embodiment of FIG. 1;

FIG. 3 is a left side elevation of the embodiment of FIG. 1; and,

FIG. 4 is a top view of the embodiment of FIG. 1. 

The ornamental design for an illuminated display sign, as shown and described. 